• Emily Rubin, Scott L Dryden-Peterson, Sarah P Hammond, Inga Lennes, Alyssa R Letourneau, Parag Pathak, Tayfun Sonmez, and M Utku Ünver.
• Division of Pulmonary and Critical Care Medicine, Massachusetts General Hospital, Boston, MA. Electronic address: erubin3@partners.org.
• Chest. 2021 Dec 1; 160 (6): 232423312324-2331.

BackgroundIn fall 2020, the Food and Drug Administration issued emergency use authorization for monoclonal antibody (mAb) therapies for outpatients with COVID-19. The Commonwealth of Massachusetts issued guidance outlining the use of a reserve system with a lottery for allocation of mAbs in the event of scarcity that would prioritize socially vulnerable patients for 20% of the infusion slots. The Mass General Brigham health system subsequently implemented such a reserve system.Research QuestionCan a reserve system be deployed successfully in a large health system in a way that promotes equitable access to mAb therapy among socially vulnerable patients with COVID-19?Study Design And MethodsWe conducted a retrospective review of the operation of the reserve system for allocation of mAb therapies to identify how referrals moved through the allocation process and what proportion of patients who were offered and received mAb therapies were socially vulnerable.ResultsNotwithstanding multiple operational challenges, the reserve system for allocation of mAb therapy worked as intended to enhance the number of socially vulnerable patients who were offered and received mAb therapy. A significantly higher proportion of patients offered mAb therapy were socially vulnerable (27.0%) than would have been the case if the infusion appointments had been allocated using a pure lottery system without a vulnerable reserve (19.8%), and a significantly higher proportion of patient who received infusions were socially vulnerable (25.3%) than would have been the case if the infusion appointments had been allocated using a pure lottery system (17.6%) INTERPRETATION: Our health system experience demonstrates that a reserve system with a lottery for tiebreaking is a viable way to distribute scarce therapeutics when enhancing access for certain groups is desirable.Copyright © 2021 American College of Chest Physicians. Published by Elsevier Inc. All rights reserved.

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